Haven't we gone a full circle? The polarized world of mass media is gone we are back in the situation that everybody has the abillity to speek.

The natural state is that everybody speaks and everybody listens. The problem is that we can't listen to everything. There must be mechanisms for filtering the information. One of them can be a marking by the creator indicating the intended audience. This mechanism is more fine grained then others used since the adressed audience might be a single person. And there are messages that are interesting only to a single person.